Info Request MCU16/0153

                                                                                                      MCU16/0153



                       9. An assessment of the increased diversity of residential three and four bedroom
                          dwellings to be provided as part of the development in terms of the number of
                          current and future three and four bedroom dwellings in the immediate area, the
                          wider Sunshine Coast or at other similar SA2s. The supply and demand of three and
                          four bedroom dwellings, including number of sales should be included..

                  Issue – Water Quantity

                  No information has been provided in regards to water quantity management for the
                  proposed development.

                  Information Required

                       10. Further information is required to demonstrate how increased flow rates resulting
                           from the additional impervious areas will be mitigated to ensure a non-worsening of
                           peak flows discharging from the site.

                  Issue – Water Quality

                  No MUSIC file (.sqz) file has been provided for the model to allow verification of parameters
                  used in the water quality assessment.

                  The SMP has stated that model parameters are in accordance with the WaterbyDesign
                  MUSIC Modelling Guidelines however it does not contain reporting tables for parameters
                  used in the model.

                  Information Required

                       11. MUSIC file (.sqz)

                       12. As per Appendix B of the WaterbyDesign MUSIC Modelling Guidelines critical
                           elements required include:

                            a. What evapotranspiration data has been used;

                            b. How the surface area for the bio-retention devices was calculated. Specifically,
                               has it been calculated using the median surface area method (not the surface
                               area at the top of the extended detention depth);

                            c. Other general bio-retention treatment node parameters including but not limited
                               to TN content, saturated hydraulic conductivity and orthophosphate content; and

                            d. Details in relation to how areas outside of the road reserve that are included
                               within the MUSIC catchments will be conveyed to the treatment systems.




                                                                                                      Page 3 of 13


Document Set ID: 20272939
Version: 3, Version Date: 10/02/2017